如何在linq中访问等待方法的属性？

Question

我有这个查询,我找不到正确的方法来获得价格(.Amount.GetValueOrDefault()).

private IEnumerable<Product> GetSubsciptionOffers(IEnumerable<StripeProduct> productList)
{
    return productList
        .Select(async product => new Product
        {
            Name = product.Name,
            Id = product.Id,
            Image = new Uri(product.Images.First()),
            Description = product.Description,
            OfferType = OfferTypeEnum.Pro,
            Price = await _planRepo.GetPlanByIdAsync(product.Metadata.First().Value).Amount.GetValueOrDefault()
        });
}

错误是:

任务不包含金额的定义

Answer 1

你必须用括号括起来await:

Price = (await _planRepo.GetPlanByIdAsync(product.Metadata.First().Value)).Amount.GetValueOrDefault()

原因是.运营商的优先级高于await.